Most New York renovation budgets treat the permit as a formality. In practice it is the item that sets the schedule, decides which contractors are eligible to do the work and determines whether the finished apartment can be sold or refinanced without complications.

The rules are not intuitive. A full cabinet replacement may need no Department of Buildings filing at all, while moving a sink three feet triggers drawings, a licensed plumber and an inspection. This guide sets out where the line falls in 2026, what each step costs, how long it takes and what happens when the permit is skipped.

What needs a permit and what does not

The Department of Buildings, known as DOB, exempts a short list of minor alterations and ordinary repairs. Almost everything else needs a filing.

Type of work	DOB permit	Who does the work
Painting and plastering	No	Licensed home improvement contractor
New cabinets and countertops in the same layout	No	Licensed home improvement contractor
Resurfacing floors	No	Licensed home improvement contractor
Replacing a faucet, sink or toilet in the same position	No	Licensed master plumber
Moving or adding plumbing fixtures	Yes	Licensed master plumber
Rerouting gas piping or relocating a range	Yes	Licensed master plumber
New circuits, added outlets or a panel upgrade	Yes, electrical permit	Licensed electrician
Removing or building walls	Yes	Contractor working from filed drawings
Combining apartments or changing the use of a space	Yes, may affect the certificate of occupancy	Contractor working from filed drawings

The practical test is whether the work touches plumbing, gas, electrical wiring, ventilation or walls. If it does, assume a filing is required. DOB guidance states that most kitchen and bathroom renovations need an alteration application filed by a registered architect or professional engineer.

Two points catch owners out. Exempt work is still regulated: the contractor must hold a home improvement contractor license from the Department of Consumer and Worker Protection, and even a like for like fixture swap must be done by a licensed master plumber. And a kitchen that keeps every appliance in place can still need a permit if outlets are added or the gas line is altered.

The filings behind a typical renovation

Filing	Formerly known as	Used for
Alteration	Alt-2 and Alt-3	Most apartment renovations: several work types with no change to use, egress or occupancy
Alteration-CO	Alt-1	Work that changes use, egress or occupancy and requires a new or amended certificate of occupancy
Limited Alteration Application	LAA	Plumbing, fire suppression piping and oil burner repair or replacement with no construction work
Electrical permit	Unchanged	Wiring work, filed by the licensed electrician

Filings are made online through the DOB NOW portal. An alteration application must be prepared by a registered architect or professional engineer, while limited alteration and electrical filings are submitted by the licensed trade doing the work. Architects, contractors and building staff still use the old Alt-2 label, so expect to see both names in proposals and board packages.

What the permit costs

Item	Typical cost
DOB filing fee	About 1 percent of estimated construction cost
Architect or engineer drawings and filing	8 to 20 percent of construction cost for full service
Expeditor	2,500 to 8,000 USD
Asbestos investigation and report	500 to 1,500 USD
Landmarks filing, where applicable	Separate fee scaled to construction cost
Plumbing and electrical permits	Usually carried in the trade price

DOB notices have described the standard alteration fee for buildings other than one to three family homes as 225 USD covering the first 3,000 USD of work plus 10.30 USD for each further 1,000 USD. On that basis a 100,000 USD renovation carries a filing fee of roughly 1,225 USD. One to three family homes pay a lower rate. Fee schedules are revised from time to time, so confirm the current figure with the filing professional before fixing the budget.

How long approval takes

Step	Typical duration
Drawings and scope definition	3 to 8 weeks
Co-op or condo board review	4 to 12 weeks
Asbestos investigation	1 to 2 weeks
DOB approval, professionally certified filing	Several days to 2 weeks
DOB approval, standard plan examination	4 to 8 weeks, longer if objections are issued
Landmarks review, where applicable	1 to 6 weeks

Professional certification is the main lever on DOB time. The architect or engineer certifies that the drawings comply with code, and DOB accepts the filing without a full plan examination, subject to audit. Standard review means an examiner reads the drawings and may issue objections that have to be resolved one by one.

The longer delay is usually inside the building. The application needs sign off from the building side as well as from the apartment owner: the corporation in a co-op and the board in a condo. In practice the DOB filing cannot be completed until the alteration agreement is approved. Running the board package and the DOB drawings in parallel, from the same set of documents, is what keeps a renovation from losing a season.

Approvals that are easy to miss

Requirement	When it applies	What it involves
Asbestos assessment	Buildings constructed before April 1987	A certified asbestos investigator inspects and reports before DOB issues the permit. Disturbing more than 10 square feet or 25 linear feet of asbestos material triggers formal abatement first
Landmarks approval	Individual landmarks and historic districts	Work that needs a DOB permit also needs Landmarks Preservation Commission approval. Interior work usually qualifies for a certificate of no effect
Lead safe work practices	Homes built before 1978	Contractors disturbing painted surfaces must be certified under the federal renovation rule
Alteration agreement	Co-ops and most condos	Insurance certificates, deposits, permitted work hours and review by the building engineer

The asbestos step is the one most often discovered late. It applies even to modest jobs, it has to be carried out by an investigator certified by the Department of Environmental Protection, and if abatement is required the construction permit waits until that work is complete.

What happens if you skip the permit

Situation	Consequence
Unpermitted work in a one or two family home or inside a co-op or condo unit	Civil penalty of six times the permit fee, minimum 600 USD, maximum 10,000 USD
Unpermitted work in other buildings	21 times the permit fee, minimum 6,000 USD, maximum 15,000 USD
Stop work order	All work halts until the violation is resolved
Most serious class of violation	Fines of up to 25,000 USD plus additional penalties
Sale or refinancing	Unpermitted work has to be legalized or removed

The penalty itself is rarely the real cost. Legalizing work after the fact means hiring an architect to document what was built, opening finished walls for inspection and paying the original filing fees on top of the penalty. In a co-op, unpermitted work is also a breach of the alteration agreement, which gives the board grounds to stop the job entirely.

Choosing a contractor who can pull the permit

Permits are issued to licensed and insured contractors, not to owners, so the credential check belongs at the start of the process and not after a bid has been accepted. Confirm the home improvement contractor license, the trade licenses of the plumber and electrician who will actually be on site, and current general liability and workers compensation coverage. Starting from a directory of licensed general contractors in New York that shows license details and active status turns that check into a matter of minutes.

The permit drawings also solve the hardest part of pricing. Once an architect has defined the scope for DOB, the same document can be issued to every bidder, which removes the differences in assumptions that make renovation quotes impossible to compare. A construction bidding platform applies that principle directly: the project is described once, contractors respond against the same scope and the bids arrive ready to compare line by line.

Frequently asked questions

Do I need a permit to renovate a kitchen in NYC?

Not if the work is limited to new cabinets, countertops, flooring and paint with every appliance and fixture staying where it is. A permit is required as soon as the project moves plumbing, alters the gas line, adds electrical circuits or outlets, or changes a wall.

Do I need a permit to renovate a bathroom?

Replacing fixtures and tile in the same positions is generally exempt, although the fixture work must be done by a licensed master plumber. Moving the toilet, tub or shower, adding a bathroom or changing the ventilation requires a filing.

Can a homeowner file the permit application personally?

No. Alteration applications are filed by a registered architect or professional engineer, and plumbing and electrical filings are submitted by the licensed trades. The owner authorizes the filing and remains responsible for the property.

How long does a DOB permit take in 2026?

A professionally certified alteration can be approved within days to two weeks once the documents are complete. Standard plan examination typically takes four to eight weeks. Board review and the asbestos report usually add more time than DOB itself.

What is the penalty for renovating without a permit?

For a one or two family home or the interior of a co-op or condo unit, six times the permit fee with a minimum of 600 USD and a maximum of 10,000 USD. For other buildings it is 21 times the fee, between 6,000 and 15,000 USD. Stop work orders and the cost of legalizing the work come on top.

Does co-op board approval replace the DOB permit?

No. They are separate approvals with separate purposes. The board enforces the rules of the building through the alteration agreement, and DOB enforces the construction codes. Most renovations that move plumbing, gas, wiring or walls need both.